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350-401 Practice Question: Given the following EIGRP configuration on a…
Given the following EIGRP configuration on a router:
router eigrp 200 network 192.168.1.0 0.0.0.255 network 10.0.0.0
Which statement about this configuration is true?
⚠ Common exam trap
Cisco often tests the distinction between classful and classless network statements in EIGRP, where candidates mistakenly assume that a network statement without a wildcard mask applies only to the exact subnet rather than the entire classful range.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
EIGRP will be enabled on any interface with an IP address in the 10.0.0.0/8 range, and only on interfaces with an IP address in the 192.168.1.0/24 range.
The first network statement uses a wildcard mask (0.0.0.255) to enable EIGRP only on interfaces in the 192.168.1.0/24 subnet, while the second network statement (10.0.0.0) is classful and enables EIGRP on all interfaces in the 10.0.0.0/8 range. EIGRP network statements can include a wildcard mask to specify a subnet; without one, the router assumes the classful boundary.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
EIGRP will be enabled on any interface with an IP address in the 10.0.0.0/8 range, and only on interfaces with an IP address in the 192.168.1.0/24 range.
Why this is correct
Correct. The first network statement uses a wildcard mask to specify the exact subnet, while the second is classful.
- ✗
Both network statements are classful and will enable EIGRP on all interfaces with IP addresses in the 192.168.0.0/16 and 10.0.0.0/8 ranges.
Why it's wrong here
Incorrect. The first network statement includes a wildcard mask, making it not classful.
- ✗
EIGRP will only be enabled on interfaces with an IP address in the 192.168.1.0/24 range.
Why it's wrong here
Incorrect. The second network statement will also enable EIGRP on interfaces in the 10.0.0.0/8 range.
- ✗
This configuration will cause an error because wildcard masks are not allowed in EIGRP network statements.
Why it's wrong here
Incorrect. Wildcard masks are allowed in EIGRP network statements in classic mode.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Last reviewed: Jun 24, 2026
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